A DDoS attack is one in which a website’s servers are overloaded by a vast number of systems trying to access them, which often forces the site offline.

Swedish Armed Forces Communications and Public Affairs representative Therese Fagerstedt told The Local that it was not clear who was responsible, but it appears the DDoS may have been carried out to protest the charges laid against WikiLeaks founder Julian Assange.

Prosecutors in Sweden want to charge Assange over alleged sex crimes. He has taken refuge at Ecuador’s London embassy since June, and has been granted asylum by Ecuador.